NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Glenrock, WY
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Glenrock, Wyoming since records began in 1851. Since 1950, 26 tornadoes have touched down within 25 miles, 1 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 26
- EF3 or stronger
- 1
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Glenrock
The strongest of the 26 tornadoes within 25 miles was an EF3 on July 28, 2018; its path came within 23 miles. Of the 26, one had a path within 5 miles of the city centre, and 9 have come since 2000. June has had the most tornadoes, 10. The most recent tornado was on June 17, 2025. Glenrock has more tornadoes within 25 miles than 71% of the 35 Wyoming cities on this site. Hail has been reported within 10 miles 23 times since 1962, with stones up to 2.75 inches (baseball size). Glenrock has more hail reports within 10 miles than 57% of the 35 Wyoming cities.
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Tornadoes within 25 miles of Glenrock
By decade
- 2020s1
- 2010s6(1 EF3+)
- 2000s2
- 1990s3
- 1980s6
- 1970s6
- 1960s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jul 28, 2018 | EF3 | 23 mi | 4.44 mi | 0 / 0 |
| Jun 18, 1987 | F2 | 23 mi | 7 mi | 0 / 0 |
| Jun 5, 1982 | F2 | 21 mi | 7 mi | 0 / 1 |
| May 29, 1971 | F2 | 17 mi | 0.2 mi | 0 / 3 |
| Jun 12, 2017 | EF1 | 18 mi | 0.5 mi | 0 / 0 |
| Jun 5, 1982 | F1 | 25 mi | 7 mi | 0 / 3 |
| Jun 20, 1977 | F1 | 11 mi | 0.1 mi | 0 / 0 |
| Jul 27, 1962 | F1 | 22 mi | 0.5 mi | 0 / 0 |
| Aug 23, 2019 | EF0 | 24 mi | 0.83 mi | 0 / 0 |
| Jul 26, 2018 | EF0 | 22 mi | 0.23 mi | 0 / 0 |
| Jun 16, 2015 | EF0 | 7 mi | 1 mi | 0 / 0 |
| Jun 22, 2013 | EF0 | 14 mi | 0.08 mi | 0 / 0 |
The strongest 12 of 26, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Glenrock
The Storm Prediction Center has 23 hail reports within 10 miles of Glenrock since 1962, made on 20 separate days. Of these, 20 were 1 inch across or larger, and 3 reached 2 inches. The largest size, 2.75 inches (baseball size), was reported on 2 days, most recently June 12, 1986. The most recent report is from July 14, 2023. May has the most reports, 8.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Glenrock
The nearest NOAA station with 1991–2020 climate normals is Casper Wwtp, WY, 20 miles west of Glenrock at 5,097 feet. July is the warmest, with an average high of 88°F and low of 56°F; January is the coolest, at 38°F and 17°F. May is the wettest at 2.7 inches of precipitation on average and January the driest at 0.4 inches; the year adds up to 13.6 inches over 38 days with at least a tenth of an inch. Highs reach 90°F on about 36 days a year, almost all from June to September. Lows fall below freezing on about 163 nights a year. That 13.6 inches is more than at 18 of the 32 Wyoming stations used on this site (56%). Douglas, 29 miles east, has its own station (Douglas Converse Co Airport, WY): 11.3 inches a year, 2.3 less than here, and a July average high of 89°F against 88°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 38 | 17 | 0.4 | 2 |
| Feb | 40 | 18 | 0.6 | 2 |
| Mar | 49 | 25 | 1.0 | 3 |
| Apr | 57 | 31 | 1.5 | 5 |
| May | 67 | 41 | 2.7 | 6 |
| Jun | 79 | 50 | 1.6 | 3 |
| Jul | 88 | 56 | 1.2 | 3 |
| Aug | 87 | 55 | 1.0 | 3 |
| Sep | 76 | 44 | 1.1 | 3 |
| Oct | 61 | 33 | 1.3 | 3 |
| Nov | 48 | 25 | 0.5 | 2 |
| Dec | 38 | 17 | 0.7 | 3 |
| Year | 61 | 34 | 13.6 | 38 |
Averages for 1991–2020 at Casper Wwtp, WY (5,097 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Glenrock
Since 1996, the National Weather Service has logged 8 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Glenrock: 8 thunderstorm wind reports. The strongest thunderstorm gust on record here was 82 mph, on July 3, 2023.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Converse County, which includes Glenrock, has been named in 5 federal disaster or emergency declarations since 1978, 2 of them major disasters (by incident: 2 biological emergencies, 2 fires, 1 flood). The latest major disaster declaration was Covid-19 Pandemic, on April 11, 2020. FEMA's National Risk Index gives Converse County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for hail, inland flooding and lightning; Very Low for tornadoes, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $9.7 million a year, the 12th highest of 23 Wyoming counties; of the hazards above, the largest share, $4.7 million (48%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Glenrock
- Evansville, WY13 mi
- Casper, WY24 mi
- Douglas, WY29 mi
- Wheatland, WY68 mi
- Rawlins, WY91 mi
- Gillette, WY92 mi
- Newcastle, WY98 mi
- Torrington, WY99 mi
- Saratoga, WY101 mi
- Laramie, WY105 mi
- Buffalo, WY111 mi
- Mitchell, NE123 mi
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